Merge pull request #33 from p0deje/master

Release v1.2.1
Merge pull request #34 from p0deje/master

Release v1.2.2
Merge pull request #35 from p0deje/master

Release v1.2.3
fix in 6th sample
Merge pull request #37 from p0deje/master

Webhook support for Envelope#send!
add signature sample
Merge pull request #38 from p0deje/master

Release v1.2.5
added docs for samples
Update examples/api-samples/README.md
update views and samples, change docs location
add docs
Update examples/api-samples/README.md
fix doc link
Merge branch 'master' of github.com:groupdocs/groupdocs-ruby
add sample php file for signature
update envelop sample
finel version of envelop sample
Merge pull request #39 from p0deje/master

Release v1.2.6
add new samples
update new samples